A Development Permit and a Building Permit, will always be required for additions and enclosures. Depending on your project, Plumbing, Gas, and Electrical Permits may also be required.
There are many considerations to every project such as:
Hinton's Land Use Bylaw describes rules and requirements for building additions and enclosures in town.
Check out the Inspections Group reference guide for guidelines on applying for Building, Electrical, Gas, and Plumbing Permits.